[android-common:android14-6.1 240/258] arch/arm64/kvm/hyp/nvhe/serial.c:41:6: warning: no previous prototype for function 'hyp_puts'

[kernel test robot <lkp@intel.com>]

tree:   https://android.googlesource.com/kernel/common android14-6.1
head:   a68bd014933d54623838ac1c07fd725694631e53
commit: b21ae4963d0d204a1405c4aedd76eb01cd79dfdd [240/258] ANDROID: KVM: arm64: Add serial framework for pKVM
config: arm64-randconfig-r013-20230908 (https://download.01.org/0day-ci/archive/20230908/202309082322.BULCgRwR-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230908/202309082322.BULCgRwR-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202309082322.BULCgRwR-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> arch/arm64/kvm/hyp/nvhe/serial.c:41:6: warning: no previous prototype for function 'hyp_puts' [-Wmissing-prototypes]
      41 | void hyp_puts(const char *s)
         |      ^
   arch/arm64/kvm/hyp/nvhe/serial.c:41:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
      41 | void hyp_puts(const char *s)
         | ^
         | static 
>> arch/arm64/kvm/hyp/nvhe/serial.c:53:6: warning: no previous prototype for function 'hyp_putx64' [-Wmissing-prototypes]
      53 | void hyp_putx64(u64 x)
         |      ^
   arch/arm64/kvm/hyp/nvhe/serial.c:53:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
      53 | void hyp_putx64(u64 x)
         | ^
         | static 
>> arch/arm64/kvm/hyp/nvhe/serial.c:59:6: warning: no previous prototype for function 'hyp_putc' [-Wmissing-prototypes]
      59 | void hyp_putc(char c)
         |      ^
   arch/arm64/kvm/hyp/nvhe/serial.c:59:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
      59 | void hyp_putc(char c)
         | ^
         | static 
>> arch/arm64/kvm/hyp/nvhe/serial.c:65:5: warning: no previous prototype for function '__pkvm_register_serial_driver' [-Wmissing-prototypes]
      65 | int __pkvm_register_serial_driver(void (*cb)(char))
         |     ^
   arch/arm64/kvm/hyp/nvhe/serial.c:65:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
      65 | int __pkvm_register_serial_driver(void (*cb)(char))
         | ^
         | static 
   4 warnings generated.


vim +/hyp_puts +41 arch/arm64/kvm/hyp/nvhe/serial.c

    40	
  > 41	void hyp_puts(const char *s)
    42	{
    43		if (!hyp_serial_enabled())
    44			return;
    45	
    46		while (*s)
    47			__hyp_putc(*s++);
    48	
    49		__hyp_putc('\n');
    50		__hyp_putc('\r');
    51	}
    52	
  > 53	void hyp_putx64(u64 x)
    54	{
    55		if (hyp_serial_enabled())
    56			__hyp_putx4n(x, 64);
    57	}
    58	
  > 59	void hyp_putc(char c)
    60	{
    61		if (hyp_serial_enabled())
    62			__hyp_putc(c);
    63	}
    64	
  > 65	int __pkvm_register_serial_driver(void (*cb)(char))

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